A notification indicating that number of active session on a Vlan has reached the maximum limit. There won't be any new PPPoE session possible on this Vlan. The maximum limit can be referred through object cPppoeSystemPerVLANlimit. The Vlan ID of vlan can be referred though object cPppoeSystemSessionVlanID. If Vlan is QinQ, cPppoeSystemSessionInnerVlanID refers the inner Vlan id. In case the vlan is not QinQ cPppoeSystemSessionInnerVlanID will be zero. The interface details can be referred through ifDescr object. An agent must not generate more than one cPppoeSystemSessionPerVLANLimitNotif `trap-event` in a 30 second period, where a `trap-event` is the transmission of a single trap PDU to a list of trap destinations. If additional `the number of PPPoE sessions on this Vlan exceeds the allowed limit` condition occur within the 30 second `throttling` period, then these trap-events should be suppressed by the agent.